:root {
  color-scheme: dark;
  --bg: #06070a;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-strong: rgba(255, 255, 255, 0.06);
  --text: #f7f8f8;
  --muted: #a8b0bd;
  --quiet: #737b89;
  --border: rgba(255, 255, 255, 0.09);
  --accent: #6d77ff;
  --accent-strong: #7f89ff;
  --success: #12c98d;
  --shadow-card: 0 20px 70px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 22% 0%, rgba(109, 119, 255, 0.22), transparent 34rem),
    radial-gradient(circle at 78% 12%, rgba(18, 201, 141, 0.12), transparent 30rem),
    linear-gradient(180deg, #08090c 0%, var(--bg) 44%, #030405 100%);
  color: var(--text);
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, .button:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 4px; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin-top: 0; }

.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 650;
  transition: top 150ms ease;
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  background: rgba(6, 7, 10, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  border-radius: 16px;
}

.brand img {
  display: block;
  width: min(240px, 45vw);
  height: auto;
  border-radius: 12px;
}

@media (min-width: 861px) {
  .site-header {
    padding: 1.08rem 1.35rem;
  }

  .brand {
    padding: 0.22rem;
    background: linear-gradient(135deg, rgba(109, 119, 255, 0.18), rgba(18, 201, 141, 0.08));
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 14px 38px rgba(0, 0, 0, 0.24), 0 0 34px rgba(109, 119, 255, 0.12);
  }

  .brand img {
    width: clamp(300px, 25vw, 340px);
    border-radius: 14px;
  }
}

nav { display: flex; align-items: center; gap: 1.1rem; font-size: 0.91rem; color: var(--muted); }
nav a { transition: color 150ms ease, border-color 150ms ease, background 150ms ease; }
nav a:hover { color: var(--text); }
.nav-cta {
  padding: 0.62rem 0.9rem;
  color: white;
  background: rgba(109, 119, 255, 0.18);
  border: 1px solid rgba(127, 137, 255, 0.42);
  border-radius: 999px;
  white-space: nowrap;
}

main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
#how, #model, #launch { scroll-margin-top: 8.5rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
  padding: clamp(3.5rem, 8vw, 6.5rem) 0 clamp(3rem, 6vw, 5rem);
}
.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h1 {
  max-width: 800px;
  margin-bottom: 1.25rem;
  font-size: clamp(2.4rem, 5.2vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
  font-weight: 620;
}
.lead {
  max-width: 640px;
  color: #c5ccd7;
  font-size: clamp(1.04rem, 1.8vw, 1.22rem);
}
.actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.82rem 1.08rem;
  border-radius: 10px;
  font-weight: 620;
  border: 1px solid var(--border);
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}
.button:hover { transform: translateY(-1px); }
.primary {
  background: linear-gradient(135deg, #5d66dc, #7f89ff);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 12px 32px rgba(93, 102, 220, 0.3);
}
.secondary { background: rgba(255, 255, 255, 0.035); color: var(--muted); }
.secondary:hover { color: var(--text); border-color: rgba(255, 255, 255, 0.2); }
.hero-note { margin: 1.15rem 0 0; font-size: 0.92rem; color: var(--quiet); }
.hero-note a { color: var(--muted); border-bottom: 1px solid rgba(255, 255, 255, 0.22); transition: color 150ms ease; }
.hero-note a:hover { color: var(--text); }

.feature, .steps li, .launch, .cta-band {
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow-card);
}

.section { padding: clamp(3rem, 6vw, 5.25rem) 0; }
.section + .section { border-top: 1px solid rgba(255, 255, 255, 0.05); }
.section > h2, .launch h2 {
  max-width: 720px;
  margin-bottom: 0.9rem;
  font-size: clamp(1.85rem, 3.6vw, 2.9rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}
.section-lead { max-width: 620px; margin-bottom: 0; color: var(--muted); font-size: 1.02rem; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2.25rem; counter-reset: step; }
.steps li { counter-increment: step; padding: 1.6rem; }
.steps li::before {
  content: "0" counter(step);
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.22rem 0.62rem;
  border: 1px solid rgba(127, 137, 255, 0.38);
  border-radius: 999px;
  background: rgba(109, 119, 255, 0.12);
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.1em;
}
.steps h3 { margin-bottom: 0.5rem; font-size: 1.12rem; letter-spacing: -0.02em; }
.steps p { margin-bottom: 0; color: var(--muted); font-size: 0.95rem; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 2.25rem; }
.feature { padding: 1.6rem; }
.feature h3 { margin-bottom: 0.5rem; font-size: 1.15rem; letter-spacing: -0.02em; }
.feature p, .launch p, footer { color: var(--muted); }
.feature p { margin-bottom: 0; }

.launch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: clamp(2rem, 5vw, 4rem) 0;
  padding: clamp(1.5rem, 4vw, 2.3rem);
}
.launch h2 { margin-bottom: 0.75rem; }
.launch p { max-width: 520px; margin-bottom: 0; }
.platforms { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.platforms span {
  padding: 0.76rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: #eef1f6;
  background: rgba(255, 255, 255, 0.04);
  white-space: nowrap;
}

.cta-band {
  margin: 0 0 clamp(3rem, 6vw, 5rem);
  padding: clamp(2.25rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% -20%, rgba(109, 119, 255, 0.2), transparent 24rem),
    linear-gradient(180deg, var(--panel-strong), var(--panel));
  text-align: center;
}
.cta-band h2 { margin-bottom: 0.6rem; font-size: clamp(1.7rem, 3.2vw, 2.5rem); line-height: 1.08; letter-spacing: -0.04em; }
.cta-band p { max-width: 540px; margin: 0 auto 1.6rem; color: var(--muted); }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 0.92rem;
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.4rem; margin-bottom: 1.5rem; color: var(--muted); }
.footer-nav a { transition: color 150ms ease; }
.footer-nav a:hover { color: var(--text); }
footer p { margin-bottom: 0.5rem; }
.fine-print { max-width: 760px; color: var(--quiet); }

@media (max-width: 860px) {
  .site-header { position: static; align-items: flex-start; flex-direction: column; }
  nav { width: 100%; overflow-x: auto; padding-bottom: 0.25rem; }
  #how, #model, #launch { scroll-margin-top: 1.5rem; }
  .hero, .grid, .steps { grid-template-columns: 1fr; }
  .launch { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 520px) {
  main, footer { padding-left: 1rem; padding-right: 1rem; }
  .site-header { padding: 1rem; }
  .brand { display: block; width: 100%; }
  .brand img {
    width: 100%;
    max-width: none;
    height: auto;
    border-radius: 14px;
  }
  nav { font-size: 0.85rem; gap: 0.8rem; }
  h1 { font-size: 2.3rem; }
  .actions, .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, nav a, .footer-nav a, .hero-note a, .skip-link { transition: none; }
  .button:hover { transform: none; }
}